The maximum efficiency of an optically thin photosynthetic system in converting solar radiation into chemical energy is theoretically considered as a function of the absorption spectrum of the photon-collecting pigment. The absorption band position giving maximum rate of power conversion is close to 700 nm in full sunlight and at somewhat shorter wavelength in weaker light. The chemical potential

Popular Abstract in Swedish Den övergripande målsättningen med denna avhandling har varit att undersöka molekylära förändringar i icke läkande venösa bensår. Framförallt har fokus lagts på faktorer som underhåller den ständigt pågående inflammationen i venösa sår. Med tanke på att alla venösa sår alltid koloniseras av olika bakterier, har vi undersökt hur bakterier kan påverka sårläkning och inflaChronic skin ulcers are a major health problem and an increasing burden on health care providers. These ulcers have various underlying causes, such as venous or arterial insufficiency, diabetes, or vasculitis. Non-healing venous leg ulcers represent a condition characterized by excessive inflammation and presence of bacteria. The overall aim of this thesis has been to explore the pathogenesis of t

This thesis consists of a collection of essays on endogenous trade policies and may briefly be summarized as follows. The first essay empirically examines determinants of bilateral trade protection originating from normative trade theory, endogenous trade-policy studies, and political arguments put forward in the public debate. Overall protection level measures are constructed and the data sample

Eight patients with primary hypothyroidism were compared to eleven euthyroid subjects with regard to the effects of a single i.v. dose of heparin on plasma lipoprotein concentrations (the "clearing reaction"). The hypothyroid patients were moderately hypercholesterolemic but had normal plasma triglyceride levels. Maximal activities of hepatic lipase (HL) and lipoprotein lipase (LPL) were lower in

The brain lesions in stroke-prone spontaneously hypertensive rats (SHRSP) are characterized by multifocal microvascular and spongy-cystic parenchymal alterations particularly in the gray matter. An essential feature of the lesions is the presence of edema with massive extravasation of plasma constituents as evidenced by specific gravity measurements, Evans blue technique and immunohistochemistry.

We determine simple approximate relations between the distributions of the interarrival times and the total time of a stopped counting pro- cess, under the assumption of small intensities. These relations sug- gest applying recent results for nonparametric estimation of monotone and convex densities. The results are applied to estimating the distri- bution of the period of stay of migrating birds.

High-spin states of the isotopes In-103,In-105,In-107,In-109 have been investigated using in-beam gamma-ray spectroscopic methods. Results from three different experiments are presented. Targets of Fe-54, Cr-50, and Mo-92 were bombarded by a 270 and 261 MeV Ni-58 beam and by a 95 MeV F-19 beam, respectively. Reaction channel separation was achieved with a charged-particle detector array and in the

We describe a device to study reactions relevant for the Single Event Effect (SEE) in microelectronics by means of 200A and 300AMeV, inverse kinematics, Si + H and Si + D reactions. The work is focused on the possibility to measure Z = 2-14 projectile fragments as efficiently as possible. During commissioning and first experiments the fourth quadrant of the CELSIUS storage ring acted as a spectrom

Two important dimensions of the Swedish social insurance system are those of universality (encompassing the entire population) and of compensation for loss of income. The decisions basic to the Swedish social insurance system and thus to the Swedish Welfare State were made during the 1910s. A universal pension insurance system was decided upon in 1913. This was the world's first universal public i

The helicity dependence of the total cross section for the (γ) over right arrow(p) over right arrownpi(+) pi(0) reaction has been measured for the first time at incident photon energies from 400 to 800 MeV The measurement was performed with the large acceptance detector DAPHNE at the tagged photon beam facility of the MAMI accelerator in Mainz. This channel is found to be excited predominantly whe

Popular Abstract in Swedish Förbränningsmotorer används på flera platser i samhället där energi behöver göras tillgänglig i form av mekaniskt arbete eller elektrisk energi. Den kanske mest kända tillämpningen är som kraftkälla i en personbil. Förbränningsmotorerna har givetvis ett antal fördelar som bidragit till deras popularitet och omfattande användning - lågt pris, kompakthet, driftsäkerhet ocCurrent combustion engines provide excellent performance for vehicle propulsion and power generation. However, recent demands from society ask for higher efficiencies and lower emissions. These requirements are hard to meet with current technology and call for new solutions. Homogeneous Charge Compression Ignition, HCCI, offers a potential to combine high efficiency with very low emissions. It op